Happy birthday, give or take a few days! Kendra Wilkinson's plan to get tattoos of her kids' dates of birth hits a snag in Kendra on Top's Friday, April 22, episode, as seen in Us Weekly's exclusive sneak peek.

"I'm getting an infinity sign and adding in my kids' birthdays," Wilkinson tells the camera. She points out that this would be her first time getting inked, but she doesn't specify where on her body she's getting the artwork. She and husband Hank Baskett are parents to Hank Jr., 6, and Alijah, 23 months.

Kendra Wilkinson

But trouble arises when the Girls Next Door alum is a little foggy on the specifics.

"I have two kids. And I do like dates — dates represent a lot for me," she tells the tattoo artist. "For instance, like 12 … wait, when was my son's birthday?” (For the record, Hank Jr.'s birthday is December 11, 2009, while little sister Alijah's is May 16, 2014.)